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Proceedings Paper

H.263 coding optimization: temporal subsampling driven by motion analysis
Author(s): Giuseppe Russo; Stefania Colonnese; S. Rossi; Paolo Talone
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Paper Abstract

The paper describes a coding optimization strategy in conformity with the recent ITU-T H.263 Recommendation for videophone sequences at bitrates less than 64 Kbit/s. The optimization algorithm jointly selects the temporal position of the frames to be coded and the coding mode (l, P or PB) of the selected frames. The decision is based on the observation, on a group of frames, of an 'activity' parameter, representing the variation of each frame with respect to the last coded one. The proposed strategy produces coded sequences with average frame rates lower than those produced by a non optimized coder, and a better visual quality of the single frame. However, the activity parameters evaluation, and the observation of several candidates, requires a greater delay, buffer size and complexity of the coding algorithm.

Paper Details

Date Published: 16 September 1996
PDF: 11 pages
Proc. SPIE 2952, Digital Compression Technologies and Systems for Video Communications, (16 September 1996); doi: 10.1117/12.251321
Show Author Affiliations
Giuseppe Russo, Fondazione Ugo Bordoni (Italy)
Stefania Colonnese, Fondazione Ugo Bordoni (Italy)
S. Rossi, Fondazione Ugo Bordoni (Italy)
Paolo Talone, Fondazione Ugo Bordoni (Italy)


Published in SPIE Proceedings Vol. 2952:
Digital Compression Technologies and Systems for Video Communications
Naohisa Ohta, Editor(s)

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